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yap-6.3/CLPBN/clpbn/dists.yap

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%
% distribution
%
:- module(clpbn_dist,[
dist/1,
dist/3,
dists/1,
get_dist/4,
get_dist_domain/2,
get_dist_params/2,
get_dist_domain_size/2,
get_dist_tparams/2,
dist_to_term/2
]).
:- use_module(library(lists),[is_list/1]).
/*
:- mode dist(+, -).
:- mode get_dist(+, -, -, -).
:- mode get_dist_params(+, -).
:- mode get_dist_domain_size(+, -).
:- mode get_dist_domain(+, -).
:- mode get_dist_nparams(+, -).
:- mode dist(?).
:- mode dist_to_term(+,-).
*/
/*******************************************
store stuff in a DB of the form:
db(Id, CPT, Type, Domain, CPTSize, DSize)
where Id is the id,
cptsize is the table size or -1,
DSize is the domain size,
Type is
tab for tabular
trans for HMMs
continuous
Domain is
a list of values
bool for [t,f]
aminoacids for [a,c,d,e,f,g,h,i,k,l,m,n,p,q,r,s,t,v,w,y]
dna for [a,c,g,t]
rna for [a,c,g,u]
reals
********************************************/
:- dynamic id/1, db/6.
id(1).
new_id(Id) :-
retract(id(Id)),
Id1 is Id+1,
assert(id(Id1)).
dists(X) :- id(X1), X is X1-1.
dist(V, Id, Parents) :-
var(V), !,
freeze(V, dist(V, Id, Parents)).
dist(p(Type, CPT, Parents), Id, FParents) :-
when(
(ground(Type), ground(CPT))
,
distribution(Type, CPT, Id, Parents, FParents)
).
dist(p(Type, CPT), Id, FParents) :-
when(
(ground(Type), ground(CPT))
,
distribution(Type, CPT, Id, [], FParents)
).
distribution(bool, trans(CPT), Id, Parents, FParents) :-
is_list(CPT), !,
compress_hmm_table(CPT, Parents, Tab, FParents),
add_dist([t,f], trans, Tab, Id).
distribution(bool, CPT, Id, Parents, Parents) :-
is_list(CPT), !,
add_dist([t,f], tab, CPT, Id).
distribution(aminoacids, trans(CPT), Id, Parents, FParents) :-
is_list(CPT), !,
compress_hmm_table(CPT, Parents, Tab, FParents),
add_dist([a,c,d,e,f,g,h,i,k,l,m,n,p,q,r,s,t,v,w,y], trans, Tab, Id).
distribution(aminoacids, CPT, Id, Parents, Parents) :-
is_list(CPT), !,
add_dist([a,c,d,e,f,g,h,i,k,l,m,n,p,q,r,s,t,v,w,y], tab, CPT, Id).
distribution(dna, trans(CPT), Id, Parents, FParents) :-
is_list(CPT), !,
compress_hmm_table(CPT, Parents, Tab, FParents),
add_dist([a,c,g,t], trans, Tab, Id).
distribution(dna, CPT, Id, Parents, Parents) :-
is_list(CPT), !,
add_dist([a,c,g,t], tab, CPT, Id).
distribution(rna, trans(CPT), Id, Parents, FParents) :-
is_list(CPT), !,
compress_hmm_table(CPT, Parents, Tab, FParents),
add_dist([a,c,g,u], trans, Tab, Id).
distribution(rna, CPT, Id, Parents, Parents) :-
is_list(CPT), !,
add_dist([a,c,g,u], tab, CPT, Id).
distribution(Domain, trans(CPT), Id, Parents, FParents) :-
is_list(Domain),
is_list(CPT), !,
compress_hmm_table(CPT, Parents, Tab, FParents),
add_dist(Domain, trans, Tab, Id).
distribution(Domain, CPT, Id, Parents, Parents) :-
is_list(Domain),
is_list(CPT), !,
add_dist(Domain, tab, CPT, Id).
add_dist(Domain, Type, CPT, Id) :-
db(Id, CPT, Type, Domain, _, _), !.
add_dist(Domain, Type, CPT, Id) :-
length(CPT, CPTSize),
length(Domain, DSize),
new_id(Id),
assert(db(Id, CPT, Type, Domain, CPTSize, DSize)).
%
% Often, * is used to code empty in HMMs.
%
compress_hmm_table([], [], [], []).
compress_hmm_table([*|L],[_|Parents],NL,NParents) :- !,
compress_hmm_table(L,Parents,NL,NParents).
compress_hmm_table([Prob|L],[P|Parents],[Prob|NL],[P|NParents]) :-
compress_hmm_table(L,Parents,NL,NParents).
dist(Id) :-
db(Id, _, _, _, _, _).
get_dist(Id, Type, Domain, Tab) :-
db(Id, Tab, Type, Domain, _, _).
get_dist_params(Id, Parms) :-
db(Id, Parms, _, _, _, _).
get_dist_domain_size(Id, DSize) :-
db(Id, _, _, _, _, DSize).
get_dist_domain(Id, Domain) :-
db(Id, _, _, Domain, _, _).
get_dist_nparams(Id, NParms) :-
db(Id, _, _, _, NParms, _).
dist_to_term(_Id,_Term).